Power down of RTL8720D on Wio Terminal

I’m wondering if anybody has got the RTL8720D into a low power state and then started it again, reliably!

The Wio_T schematic has an RTL8720D_CHIP_PU Pin 24, however the RTL820Dx/QFN48 has CIP_EN/Pin1 - not found any application notes on how this should work.
The data sheet is basic, mentioning a low power DLPS once, but can’t find any application notes.
The data sheet references a sleep mode with typical current 38uA - nice! but how to get there and back.

I’m wondering if anybody has managed to make it work